Finding the Fourth Proportional to 99,736.89, 137,642.18 and 57,298.16

Step by Step Solution

1. Step 1: Write the proportion equation
   99,736.89 : 137,642.18 = 57,298.16 : x
2. Step 2: Convert to fraction form
   99,736.89/137,642.18 = 57,298.16/x
3. Step 3: Cross multiply
   99,736.89x = 137,642.18 × 57,298.16
4. Step 4: Simplify right side
   99,736.89x = 7,886,642,677.69
5. Step 5: Solve for x
   x = 7,886,642,677.69/99,736.89
6. Step 6: Final answer
   x = 79,074.48